Foundry mixer



Oct. 21 1924.

T. A. HIBBINS FOUNDRY MIXER Filed March 26 1924 2 Sheets-Sheet l T. A;'HIBBINS FOUNDRY MIXER Filed March 26 1924 2 Sheets-Sheet 2 PatentedOct. 21, 1924.

UNITED STATES PATENT OFFICE.

THOMAS A. HIBBIN S, OF WELLSVILLE, OHIO, ASSIGNOR TO THE STEVENSONCOMPANY,

OF WELLSVILLE, OHIO, A CORPORATION OF OHIO.

FOUNDRY MIXER.

Application filed March 26, 1924. Serial No. 701,967.

To all whom it may concern:

Be it known that I, THOMAS A. HIBBINS, a citizen of the United States,and a resident of Wellsville, in the county of Co lumbiana and State ofOhio, have invented certain new and useful Improvements in FoundrMixers, of which the following is a speci cation.

My invention relates to mixers particularly adaptable for mixing sandand ingredients for foundry use, and the object of the invention is tointroduce features of construction and arrangement which will facilitatethe manufacture and operation and greatly increase the efficiency.

My improved mixer is disclosed on the accompanying drawing, in Which-Fig., 1 is a plan view,

Fig. 2 is a side elevational view,

Fig. 3 is an end elevational view with the cam and mixing parts insection on line 3-3, Fig. 1,

Fig. 4 is a side elevational view of the discharge door controllinglever mechanism, and

Fig. 5 is a sectional view on plane 5-5, Fig. 1.

The supporting framework for the mixer comprises the circular wall orbottom 10 secured by means of lugs 11 to the pillars 12 which seat onthe concrete foundation or piers 13. The bottom wall has the rim 14within which is inserted the cylindrical container wall 15 in the formof a band whose ends are secured together by a tie plate 16.

. This cylindrical wall together with the bottom wall forms thecontainer or receptacle for the material to be mixed.

Centrally of and cast integral with the bottom wall is the verticalbearin frame 17 for receiving the transmission s aft 18.

Supported and bearing on top of this bearing frame is the propulsionhead 19 which intimately receives the upper end of the shaft 18 and towhich it is secured by a key 20 against relative rotational movement. A

plate 21 spans the top of the head and the screw 22 supported therebythreads into the shaft to assist in suspending it and to adjust itvertically. The plate 21 has the slot 23 for receiving the tapered key20. The frame 17 is lined with a bearing bushing 24 and between theupper end of the frame and the head bearing washers 25 land 26 areinterposed, an oil duct 2'7 leading through the head to the bearingsurface between the washers. At its upper end the frame 17 has theperipheral annular wall 28 extending into the annular groove 29 in thehead 19 to form seal for preventing sand or dust from reaching thebearing surfaces. The frame 17 has also the oil inlet 30 to the annularoil pocket 31 for providing lubrieating oil between the shaft and thebushing 24.

At the lower end of the shaft is secured the bevel gear 32 which mesheswith the drive pinion 33 on the cross shaft 34 journaled in bearings 35supported in the U- frame 36 depending from the bottom wall 10 atopposite sides thereof. It will be understood that this shaft 34 will beconnected either directly or by belt and pullay with an electric motoror other driving source.

Resting on the bottom wall 10 between the frames 17 and rim 14 is thewearing plate 14' preferably of steel, over which plate the pressureroll or muller m travels. The muller comprises the hub 37, the web 38,and the rim 39, the rim being surrounded by a semi-steel tire 40. Withinthe hub is the bearing bushing 41 having the flange 42 at its outer endwhich engages against the web 38 and is secured thereto by screws 43.The muller structure is journaled on the stub shaft 44 extendingoutwardly from the end of the arms 45 which is hinged at its other endon the pin 46, this pin extending through the spoke 47 which extendsfrom the propulsion head 19. The muller supporting stub shaft 44 extendsradially with reference to the head 19, and the pin 46 is parallel withthe stub shaft. The stub shaft is received at its inner end in thecollar 48 at the free end of the arm 45 and is locked againstlongitudinal displacement by means of the ring 49 secured to the end ofthe collar and engaging in the slot 50 in the stub shaft. The stub shafthas the diametral threaded passageway 51 therethrough which is inregister with the dia- I Extending upwardly and then laterally tooverhang the collar 48 is the bracket 55. through'which' the rod 54extends. The rod has the supporting head 56 which engages to any-desireddegree the pressure transmittedby the muller structure to the materialto be treated. The lock nut 57 is pro I vided for locking the rod afteran adjustment has been made.

The ,outer end of the collar 48 is diametrally expanded to form thebearing cup 58 for reeeivingthe inner end of the muller hub 37, theopposed surfaces being conical and suitable hearin or packing material59 being inserted. firidging the outer end of the stub shaft is theretaining frame 60 whose base receives the shaft end, and extendingthrough the yoke of the frame and thread ing axially into the shaft isthe screw 61. A key 62. secures the retaining frame against rotation.Between the frame and the flange 42 of; the muller is interposed awasher 63 of bearing material, the muller being thus journaled on thestub shaft between the retaining frame and the bearing cup 58 on the arm45, and by adjusting the screw 60 the muller hub will be retained inproper bearing engagement without lost motion and the washer and packingmaterial will prevent access of dirt, sand or other matter to thebearing surfaces. To afi'ord further protection a cap frame 64 issecured to the muller web by the screws 43 and receive the shaft endtogether with the retain- I ing frame thereon. As the shaft 18 andpropeller head 19 are rotated the muller will be rolled around on theplate 14' in the directionof the arrow indicated on Fig. 1. and willengage with the material to be treated to exert the desired pressure andother action thereon.

Extending from the end of the spoke 47 is the pivot stud 65 which hingesthe inner end of the arm 66 which at its outer end has the downwardlyextending vertical wall 67 for supporting the plow blade 68. The lowerend 68' of the plow blade is curved forwardly and the blade is set atsuch angle that when it is bodily carried with the spoke 47 along thepan floor any material on the oor will be deflected inwardly toward t eoan axis, the trailing end of the blade being in front of the muller sothat the material will be deposited in the path of the muller to besubjected to the muller pressure and mulling action. The outer edge ofthe plow blade extends close to the cylindrical container wall 15 andacts to remove accumulated material from such wall.

The plow blade is adjustable laterally, it having the lateral slots 69receiving the bolts 70 secured to and extending from the supporting wall67 of the arm 66. After adjustment the bolts are tightened and the bladesecurely held. Any wear on the outer edge of the blade can thus bereadily taken up. The blade is held down by its own weight, but itsdegree of engagement with or its distance from the pan fioor may beregulated by means of a set screw 71 threading through the lug 72 on thearm 66 and abutting against the lug 7 5 on the spoke 47. The blade canthus be adjusted to eliminate frictional engagement thereof with the panfloor and so reduce wear.

Extending from the propulsion head 19 in a direction opposite to that ofthe spoke 47 is the bracket 74 to which is secured the vertical plate 75for supporting the plow blade 76. The plow shown extends from thebearing frame 17 to within a distance of the container wall 15 its outerend curving gradually in a direction opposite to that in which the plowis bodily carried when the device is in operation. The plow serves todeflect the material in advance of it outwardly towards the wall 15 fromwhere the material is then deflected inwardly again by the plow 68. Thescrews 77 which support the plow extend through vertically elongatedopenings 78 so that the plow may be adjusted vertically with referenceto the bottom 14 of the container and to compensate for wear.

r At one side of the mixing container its floor has the rectangulardischarge opening 79 for which the trap door structure 80 is provided.The door structure is secured at its inner end to the inner end of thehorizontal shaft 81 journaled in outer and inner brackets 82 and 83respectively, the inner bracketbeing supported from the lug 84 extendingdownwardly from the container bottom. On the top of the door structureis the wearing plate 85 which, when the door is swung t0 upwardposition, fills the discharge opening 79 and is then in register withthe main wearing plates 14. Below the dis charge opening and trap dooris chute 85 which is supported in any convenient mannor from the machineframework and from which the discharged material is received inwheelbarrows or other conveyors to be carried to the desireddestination.

To the outer end of the trap door supporting shaft is secured thecontrolling lever 86 which extends horizontally when the trap door isclosed. On the rim 14 is supported the bracket 87 to which the lookinglever 88 is pivoted at its upper end, this lever normally hangingvertically downwardly against the abutment projection 89 on the frame87. At its lower end the arm 88 has the laterally extending foot 90against whose flat base the operating lever 86 normally engages to belocked in its normal horizontal position. The foot has the handleextension 91 by means of which the locking structure may be readilyswung. When the operating lever is locked in its normal position by thefoot 90 the abutment 92 on the door structure will be against thecontainer bottom and the door structure will be in closed position.Where it is desired to discharge the mixed contents the locking lever isswung upwardly in clockwise direction as indicated in dotted lines Fig.4, and upon release of the operating lever the weight of the doorstructure will cause it to swing downwardly and the operating lever toswing upwardly. The upward swing of the operating lever will be limitedby the locking structure, the lever eventually engaging with the topside w of the foot 90, this top side being preferably well rounded asindicated in Fig. 4. The door structure has also the abutment 93 whichlimits the downward swing of the door by engaging against the base ofthe bracket 83, and such abutment engaging together with the engagementof the locking foot with the upwardly swung operating lever will supportthe trap door in its open position. After discharge of the machinecontents the lever 86 is swung back to its normal position, and thelocking lever 88 will follow and bring its foot 90 into locking positionover the lever, the door being then held securely in closed positionwhile another batch of material is bein mixed and treated.

The material to be mixed is shoveled or dumped into the container andthe machine is then started. The plow 68 deflects the material inwardlyinto the path of the muller which by its weight and rolling action mixesand mulls the material. In the Wake of the muller the plow 76 deflectsthe material outwardly along the container bottom and so, by the actionof the plow and the muller, the material is shifted back and forth andthoroly mulled and mixed. The muller and the plow 68 are unrestrained intheir upward bodily movement so that they will be relieved from allstrain as they engage with the unevenly piled material'whlch theyencounter. By means of the adjustment mechanism described the muller maybe permitted to exert the full weight or only partially, depending uponthe material and distance. After a mixing operation the batch can bereadily discharged by operating the controlling lever 86:

I do not desire to be limited to the exact construction and arrangementshown and described, as changes can be made which toward said head, astub shaft extending laterally from the inner end of said arm, a mullerjournaled on said stub shaft, a suspension bracket on said head, and asuspension rod extending from said bracket and having adjustablesupporting engagement 35 with the inner end of said arm whereby theworking pressure of said muller may be "adjusted.

2. In a mixing machine of the class described, the combination of acylindrical container, a vertical axially extending bearing in saidcontainer, a propulsion head journaled on said bearing, a drive shaftsecured to said head and journaled in said bearing, driving meansconnected with said shaft, a propulsion spoke extending laterally fromsaid head, a. propulsion link hinged at its outer end to the outer endof said spoke for vertical swing and extending toward said head, a stubshaft secured at its inner end to the inner end of said arm andextending radially, a muller journaled on said stub shaft, a suspensionbracket on said head, and adjustable suspension means between saidbracket and inner end, of said arm whereby the working pressure of saidmuller may be adjuted.

3. In a mixing machine of the class described, the combination of acylindrical container, a vertical bearing extending axially in saidcontainer, a propulsion head journaled on top-of said bearing, apropulsion shaft extending from said head and journaled in said bearing,driving means connected with said shaft, a spoke extending' laterallyfrom said head, a propulsion link hinged at its outer end to the outerend of said spoke and extending inwardly parallel with said spoke, astub shaft extending radially from the inner end of said link, a mullerjournaled on said stub shaft, a bracket on said head, a sus ensio-n rodadjustably secured to said stu shaft, and a stop on said rod forengaging with said bracket to limit the downward swing of 125 said armand thereby the pressure engagement of said muller in said container.

4. In a mixing machine of the class described, the combination of acylindrical container, a vertical bearing extending axially in saidcontainer, a propulsion head journaled on said bearing, a propulsionshaft extending from said head and journaled in said bearing, drivingmeans connected with said propulsion shaft, a spoke extending laterallyfrom said head, a propulsion arm hinged at its outer end to the outerend of said spoke and extending inwardlyparallel with said spoke, a stubshaft extending laterally from the inner end of said arm, a muller journaled on said stub shaft, a bracket on said head, a suspension rodhaving adjustable threaded connection with said stub shaft, said brackethaving an opening through which the upper end of said suspension rodextends, and a stop on said suspension rod above said bracket forengaging with said bracket to limit the downward swing of said arm andthereby the pressure engagement of said muller on the material withinsaid container.

5. In a mixing machine of the class described, the combination of acylindrical container, a vertical bearing extending axially in saidcontainer, a propulsion head journaled on said bearing, a propulsionshaft suspended from said head and journaled in, said bearing, drivingmeans connected with said shaft, a propulsion spoke extending laterallyfrom said head, a propulsion arm pivoted at its outer end to the outerend of said spoke for vertical swing and extending inwardly, a stubshaft engaging at its inner end with the inner end of said arm andextending radially outwardly, a muller journaled on said stub shaft, asuspension bracket on said head, a suspension rod extending through saidbracket and through said arm and stub shaft and having adjustablethreaded engagement with said stub shaft, and a stop on the upper end ofsaid rod for engaging with said bracket, to limit the downward swing ofsaid arm and thereby the working pressure of said muller on the materialin said container.

6. In a mixing machine of the class described, the combination of acylindrical container, a vertical bearing extending axially in saidcontainer, a propulsion head journaled on top of said bearing, apropulsion shaft suspended from said head and journaled in said bearing,driving means connected with said propulsion shaft, a propulsion spokeextending laterally from said head, a propulsion arm pivoted at itsouter end to said spoke for vertical swing and ex tending inwardly andterminating alongside of said head, a stub shaft extending radially fromthe inner end of said arm, a muller journaled on said stub shaft, arodextending through the inner ends of said arm and stub shaft and actingas a key for preventing rotation of said stub shaft, a bracket on saidhead having a passageway, said rod extending upwardly through saidpassageway and permitting upward swing of said arm, and a stop on saidrod above said bracket for engaging with said bracket to limit thedownward swing of said arm and thereby the working pressure of saidmuller, said rod having threaded engagement with said stub shaft wherebythe downward swing of said arm may be adjusted for.

7. In a mixing machine of the class described, the combination of acylindrical container, a bearing extending vertically and axially insaid container, a propulsion shaft extending through and journaled insaid bearing, driving means connected with the lower end of said shaft,a propulsion head connected with the upper end of said shaft andjournaled on said bearing, a propulsion spoke extending laterally fromsaid head, a propulsion arm pivoted at its outer end to said spoke andextendin inwardly, a stub shaft extending outwardly from the inner endof said arm, a muller journaled on said stub shaft, a suspension rodsecured to the inner end of said arm to be vertically adjustablerelative thereto, a bracket on said head having a passageway, the upperend of said suspension rod extending through said passageway, and a stopon said rod for engaging with said bracket to limit the downward swingof said arm and thereby the working pressure of said muller.

8. In a mixing machine of the class described, the combination of acontainer, a propulsion shaft extending axially in said container, abearing for said shaft, a propulsion head on said shaft, a propulsionspoke extending laterally from said head, a propulsion arm pivoted atits outer end to said spoke to swing in a vertical plane, a stub shaftextending from the inner end of said arm, a muller journaled on saidstub shaft, a second arm pivoted to the outer end of said spoke to swingin a vertical plane at an angle with the plane of swing of said firstmentioned arm, said second mentioned arm extending outwardly and thendownwardly, and a plow blade secured to the downwardly extending end ofsaid second mentioned arm.

9. In a mixing machine of the class described, the combination of acylindrical container, a shaft extending axially of said container, abearing for said shaft, a propulsion head on said shaft, a propulsionspoke extending laterally from said head, a muller propulsion armpivoted at its outer end to said spoke to swing in a vertical plane andextending inwardly, a stub shaft extending radially outwardly from theinner end of said arm, a muller journaled on said stub shaft, aplowpropulsion arm pivoted at its inner end to said spoke to swing in avertical plane at an angle with the plane of swing of said mullerpropulsion arm and extending outwardly, and a plow blade supported fromsaid plow propulsion arm.

10. In a machine of the class described, the combination of a circularcontainer, a shaft extending axially through said container bottom, abearing for said shaft, mulling and plow mechanism connected with saidshaft to be carried around in said container, a driving gear secured tothe lower end of said container shaft below said container, U- framesdepending from diametrically opposite sides of said container, bearingssupported on said U-frame, a cross shaft journaled in said bearing,means for driving said cross shaft, and a pinion on said cross shaftconnected with said gear.

In witness whereof, I hereunto subscribe my name this eleventh day ofMarch A. 1).,

THOMAS A. HIBBINS.

